Function if haemoglobin

Transport if oxygen

22

3 ways in which haemoglobin differs from that of collagen

Haemoglobin has/is:1.globular2.hydrophobic (R) groups on inside/ hydrophilic (R) groups on outside3. 4 subunits4. Two alpha and 2 beta chains5. Alpha helix6. Proportion of glycine similar to that of other amino acids

Testing for carbohydrates

Reducing sugars

Place sample of food to be tested in a noiling tubeAdd benedict's solution then heat in a water bath at 80°c for 3 minutesOrange-red precipitate indicates a reducing sugar is present (low levels of sugar-contents yellow or green)